TY - JOUR AU - Böckenhauer, Hans-Joachim AU - Seibert, Sebastian TI - Improved lower bounds on the approximability of the traveling salesman problem JO - RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications PY - 2000 SP - 213 EP - 255 VL - 34 IS - 3 PB - EDP-Sciences UR - http://www.numdam.org/item/ITA_2000__34_3_213_0/ LA - en ID - ITA_2000__34_3_213_0 ER -